No I don't think I would say that what I wrote is "the" reason, I was just giving one scenario that I would bet is part of it most of the time. Even when the families I made up don't feel that way their are others who may not even be in the sport that will view the situation through that lens.
I remember entry level pysch course literature saying that there is only one reason that people get angry. That being feeling that someone is being treated unfairly. I mention that to point out that the issue we are discussing is not the only "unfair" thing that elicits this response I described in that type of family. Could be anything or the sum of a bunch of things.
I'm in that family and have witnessed it, felt it through or for others and for ourselves. Feeling like you are getting screwed through something unfair inside or outside of sports while someone else profits from the same can become infuriating. Bad officiating is another of the big ones . Unsportsmanlike conduct, fraud, nepotism, bribery etc
I guess you could have called me out for virtual signalling here too because I omitted discussing the money side of the damage but it's very real too. We put the kids through different experiences that cost hundreds of thousands for example and know many athletes that spent way more, that stings too.
